Extract from Thomas Jefferson’s Memorandum Books

15 May 1768–[Dec. 1770]

four good fellows, a lad & two girls of abt 16. each in 8 ½ hours dug in my cellar of mountain clay a place 3.f. deep, 8 f. wide & 16 ½ f. long = 142/3 cubical yds. ... in digging my dry well, at the depth of 14 f. I observed one digger,
one filler, one drawer … it was a yellow rotten stone with a great many hard stones
as large as a man’s head and some larger